Apparatus for making twyers.



No. 888,848. PATBNTBD SEPT. 8, 1908.

' G. W. HBLBHOUSE. 8

APPARATUS POR MAKING TWYERS.

APPLIGATIOFIILED APB. 30,1908.

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PATBNTBD SEPT. a, 1908.

-G. W. PIBLDHOUSE.

APPARATUS FOR MAKING TWYERS.

APPLICATION I'ILED APR. 30, 1908.

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No. 898,348. PATENTED SEPT. 8, 1908. G. W. FIELDHOUSE.

APPARATUS FOR MAKING TWYERS.

APPLXOATION FILED APB. 30,1908.

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APPARATUS POR MAKING TWYERS .APPLICATION YILED APR. 30, 190B.

PATBNTESBPT. s, 1908.

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WlTN ESSES INVENTOR QA Mam GEORGE W. FIELDHGUSE, OF OAK PARK, ILLINOIS.

APPARATUS FOR MAKING TWYEBS.

`Speeieat'ion o! Letters Patent.

Patented Sept.v 8, 1908.

Application illed April 30, 1908. Serial No. 430,979.

To'al'l lwho-m "it may concern:

Be it known that I, GEORGE FIELD- HO'USE, ofOakPark, Cook county, Illinois, have invented a new and useful i paratus for Making Twyers, of which the follbwng is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in Which- Figure 1 is 'a vertical section showing the core box in which the central core for the twyer is formed. Fig..2 is a vertical section showing the core box in which the shell core for the twyer is formed and showing the vent pipes as they are held in position while the sand is beingrammed in the core box to form the cores. ig. 3 is a plan view showing the adjustable mechanism by which the vent pi es are held in position'relativ'elyto each ot er and to the center of the core-forming apparatus. Fi 4 is a plan view of the strip per, the top hal of the view showi the drag and bottom plate in their inverte position upon the stripcper, the drag and bottom plate being remove in the lower half of this view. Fig. 5 is a vertical section'onthe line V-'V of Fig. 4 showin the drag which has been rammed and with'the inverted bottom plate in place on the drag, the bottom plate together with the drag being in readiness to -be .clamps are laced while the drag is vrammed wit 1 sand.

removed from the stripper. Fi 6 is a vertical section of the strip er on t e line Vl'.- VI fFig. 4,'the drag an bottom plate being omitted. Fig. 7 is a-vertical sectional view of the cope which has been rammed with sand, and showing the pattern for the nose f the twyer in position'in the copi 'Fien 8 is a vertical sectional view on the e VIII 'VH-lof F ig. 9 showingthe drag, cheek and cope assembled together to form the flask, and showing'th'e shell core held in position in the flask in accordance with my invention. Fig. 9 isa top lan view of the assembled iias'k shown in `ig. 8. Fig. 10 a detail view showing the means employed insecuring the vent pipes to the pipe clamps when the 'arts are assembled in place in the flask.

ig. 11 is aperspcetiveview showing a detail ofthe pipe clamp used in'securing the vent pipes in place in the drag of the mold. Fi

A12 is a detail plan view of the ad'ustab e slides on the stripper on which t ie pipe being My invention relates to the molding of cast twyeis is largely increased without increase in the cost of making such twyers.

The invention is further designed to pro vide animproved apparatus, whichis adapted for use in making twyers of various sizes and shapes, and in the use of which vthe equipment of flasks necessary to make a variety of sizes of such castings is largely reduced.

In the drawings, referring to F iff. 1, 2 re resents the core box, in which the central core B -is formed. The box 2 is mounted upon a bottom plate 3, the bottom plate and box having coacting shoulders b which the box is centered on this plate A hfting plate 4 by which the core is handled in removing it from the core box, is placed within the annular opening in the bottom plate 3. The lifting plate 4 is provided with a recessed slot, in which the T-head of the liftin rod 5 is removably secured. Surrounding t e lifting rod 5 is the pipe 6, which forms the cenv of the apparatus is formed. The base 'i' is provide with adjustable slides 8 and 9, by whichthe vent pipes 1() are secured in place 1n -their proper osition in the core box 11. The lower end o each of the pipes 10 is provided with a transverse opening or hole, through which a suitable pin 12 is inserted, this plm engaging with recesses or grooves in the s 'des 8 and 9 to hold the pipes 10 in sition while the core'is being rammed. he slides 9 are connected by means o f links 13 with a disk 14 to enable the slides 9 to be ad` vanced and retracted simultaneously when the disk 14 is turned by the o eraf-or. Each of the slides 8 and 9 is provide with a thumbscrew 15, by which the disks are locked in the v i recessA on its bottom' end, which by engage'V ment with the periphery of the core plate 16 accurately centers the core-box in place on its plate and on the base -7. .A removablek pattern `17 for the core-box 11 is then placed on the core plate 16. The pipes are suci0 cessively held at their top ends by the operator, while the bottom portion of the core is 'being formed by ramming the sand in the core box. After a small portion of the core has been formed the sand will hold the ipes in the proper position while the remain er of the coreis being formed. As ',g arm 18 is pivotally secured to the core box 17 by mean's'of a pin 18"; and the outer end of the arm 18 is provided with an adjustable llet- 20 ing tool 19, by which the shell core is rounded od to the desired radius on its 'outer upper e ge. A vReferring to Figs.4, 5 and 6,20 represents the base ofthe stripper. This stripper is provided with radial slots, in which slides 21 are -secured so as to be adjustable radially. The slides 21 are connected by means of links 22 with a disk 23, which is mounted upon the stub shaft 24 secured to the base Y 20. The disk 23 is provided with a handle 25, by which the slides 21- are advanced and retracted toward and away from the center ofA the stripper in adjusting th slides to the desired position for twyers of different sizes. On the slides 21 and projecting above the surface of the base- 20 are centering holders 29 on which the pipe clamps 30 are placed. After the slides 21 have been adjusted to the desired position relative to the center of the stripper, a pipe clam 30 is placed upon each of the centering ho ders. The drag 26 is then rammed after it has been placed on top of the base 20, and a bottomA plate 27 is then placed upon its upper surface. The drag is then in readiness to be inverted and be re moved from the stripper. Dowel pins 28 are provided on the stri per which engage with suitable ears on the ag so as to center -the drag and permit it to be'rammed with sand with the pipe clamps in the desired position.

Twyers of different sizes will have noses having fillets of different radii. For that reason a removable nose pattern 31 is sei5 cured to the bottom plate 31 by means of the pin 31. The cope is then placed in position u on the bottom plate 31* and is then ramme with sand. Aplu 32 placed inpositi-Jn centrally in the cope orms the vent in i0 tl co After the cheek has been rammed :un the pattern for the tvvyer in the usual fell-known manner, which need not be further described, the drag, the cheek and the cope, are assembledv to ether as shown in G5 Figs. 8 and 9. In assemliling these parts together, the shell core A is first secured in' place on the drag 26 by means of the pipes, which are secured to the pi e clamps on the drag by pins 33 and 34, as s own in detail in Fig. 10. The cheekis then placed in position on to of the drag, and the central core B is place in position 1n the cheek and on top of the drag. The cope is then placed on top of the cheek, the dowel pins and registe opening in the ears on the cheek, drag, an cope, insurin that the parts come inproper alinement. he apparatus is then in readi` ness to cast the twyer. f The advantages of my invention result from the manner of securing the vent pipes, 30 while rammirv the shell core of the twyer, from the use o the pipe clam s and the pins for securing the pipes to the c amp, and from the use of the improved stripper in which shell cores of various diameters and sizes may be made with the same stripper instead of providing a separate stripp -r for the shell cores used with each size of tvvyer.v Y Instead cf securing the vent pipes b means of threaded nuts to a shell plate and 9o 'if center plate, the shell late and center plate are dispensed with an the core is accurately placed in position in the mold and insures an equal thickness of metal in the shell in the wall of the twyer. The time required in adjusting the cores when the threaded nuts are employed for securing the shell core in the mo d is greatly reduced by the use of my improved ajparatus, and the use cf wires for securing t e shell core by means of the veut pipes in osition in ythe assembled mold, is'

also ren ered unnecessary.

Variationsin the construction and arr ement of the parts may be made without e- .parting from my invention. 105

1. apparatus for mo ding, a stri ing member having a plurality of radially able anchor supports; substantially as described. 'i

2. In apparatus for moldi a drag mold stripper ate having a plur ty of radially adjustab e supports, a core cente device, also having a plurahty of radially a justable supports, and means for adjusting the two sets of supports to corresponding positions; substantially as described.

3. In apparatus for moldi a drag mold stripper plate having a plur ty of radially adjustab e supports, a core centeri also having a plurality of radially justable supports, means for adjusting the two sets of supports to corresponding positions, and means for securing said su ports in their adjusted positions;'substantially as described. 125

4. In apparatus for molding, a drag moldstripper having a plurality of radially adjustable clamp supports, a core cente device, having a plurality of radially adjust le vent pipe supports, means for adjssting the two '130 device, Y i

it t( i.

sets of supoorts to corresponding positions, andmeansi justed positions; substantially as described.

5. n ap aratus for molding, a drag riiold 5 having a c amp for anchoring the core embedded in the said drag; substantially as deseibed.

In testimony whereof, I have hereunto set or locking the supports in their adn my hand.

GEORGE W. FIELDHOUSE. 

